Adjustable trolley for section tunnel construction and adjustment method

The invention discloses an adjustable trolley for section tunnel construction and an adjustment method. The trolley comprises a template system and a mobile supporting system capable of longitudinally move back and forth in a constructed tunnel, wherein the template system comprises multiple arch templates and left and right side templates which are distributed symmetrically; the two side templates and one arch template are spliced to form a forming template; the arch templates are integrated templates or assembled templates; the mobile supporting system comprises a main beam, a lower part supporting structure, a vertical supporting structure and left and right side part supporting structures. The adjustment method comprises the following steps: 1, removing the arch templates; 2, adjusting the vertical supporting structure; 3, connecting and reinforcing the arch templates; 4, reinforcing the side templates and adjusting an auxiliary supporting frame; 5, laterally moving the side templates and splicing the for